Ardra is the name of a nakshatra in Hindu astrology, the 4th or 6th depending on numbering scheme used. The Sanskrit name ãrdrã translates to "the moist one". It is associated with the star Betelgeuse (α Ori). The Ardra nakshatra extends from 06 degrees 40 minutes to 20 degrees 00 minutes of Mithun (Gemini).
The Hindu myth associated to Ardra is that of Taraka. Taraka is an asura who is granted invulnerability by Brahma[1].
The presiding deity is Rudra, its symbol is a teardrop, the ruling planet is Rahu. In Tamil and Malayalam Ardra is referred to as Thiruvathirai and Thiruvathira respectively.
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